2A rectangular room of dimensions 8 m x 6 m x 3 m is to be painted. This video explains how to find the surface area of an open top boxVideo Library. A 6452 A 6 45 2.
The area of a rectangle is the product of the two sides.
The surface area formula for a rectangular box is 2 x height x width width x length height x length as seen in the figure below. To find the surface area of a box start by calculating the area of each side using the formula a lh where l is the length and h is the height. Below are the standard formulas for surface area. Hence we can say the region enclosed by the perimeter of the rectangle is its area.